Product/Technical Expert(s)

This is one or more individuals who know the technical aspects of the product being tested. Their role is to ensure that the product does not malfunction during the test For example, if a system crashes and jeopardizes the test, someone needs to be available to restore it or provide a working backup. This is crucial if you are testing at an early stage of development when the product is temperamental and "buggy/' If the prototype or product you are testing is unstable, you should have at least one product expert available at every test

session to troubleshoot. If there is a group of people on the development'team who can take on this role, it makes sense to coordinate their time so at least one is always present.